
Bosch Security Systems | 2003-09 | 3922 988 25012en
Plena BGM/Paging System | Installation and Operating Manual | en | 10
2 Internal settings with the help of the configuration switches
Figure 2.1
Switch ON (1) OFF (0) Microphone Function
1 Priority Mix 1 (rear) Selects whether microphone 1, connected to the rear
DIN-socket, will have priority over microphones 2 and 3
and the background music. This will mute these
microphones and the music and will also override zone
switching and zone attenuation.
Closing contacts 4 and 5 will activate priority.
2 Vox Mix 1 (front) Selects whether microphone 1, connected to the front
6.3 mm phone jack socket, will be VOX activated. As
VOX activated microphone, microphone 1 will attenuate
the background music or microphones 2 and 3 to a
preset ducking level as long as you speak into the
microphone.
3Chime
active
Chime off 1 (rear) Selects whether a chime signal will precede a priority call,
started by microphone 1, upon closure of contacts 4 and
5 of the rear DIN-socket. Additionally, the chime level
control allows for setting the volume of the chime.
4 Flat Speech filter 1 Selects a flat frequency response for microphone 1 or
activates a speech filter, that improves intelligibility by
attenuating the low frequencies.
5 Phantom on Phantom off 1 (rear) Switches the phantom power supply for microphone 1
(DIN-connection only). Phantom power should be
switched on for condenser or electret microphones (e.g.
LBB 1950) and switched off for dynamic microphones.
6 Phantom on Phantom off 2 Switches the phantom power supply for microphone 2.
7 Phantom on Phantom off 3 Switches the phantom power supply for microphone 3.
Internal settings
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